<template>
  <div class="app-container">
    <!--表单-->
    <el-form :inline="true" class="demo-form-inline">
      <el-form-item>
        <el-select clearable v-model="searchObj.type" clearable placeholder="请选择">
          <el-option label="学员登录数统计" value="login_num" />
          <el-option label="学员注册数统计" value="register_num" />
          <el-option label="课程播放数统计" value="video_view_num" />
          <el-option label="每日课程数统计" value="course_num" />
        </el-select>
      </el-form-item>

      <el-form-item>
        <el-date-picker
          v-model="searchObj.begin"
          type="date"
          placeholder="选择开始日期"
          value-format="yyyy-MM-dd"
        />
      </el-form-item>
      <el-form-item>
        <el-date-picker
          v-model="searchObj.end"
          type="date"
          placeholder="选择截止日期"
          value-format="yyyy-MM-dd"
        />
      </el-form-item>
      <el-button
        :disabled="btnDisabled"
        type="primary"
        icon="el-icon-search"
        @click="showChart()"
        >查询</el-button
      >
    </el-form>

    <div class="chart-container">
      <div id="chart" class="chart" style="height: 500px; width: 100%" />
    </div>
  </div>
</template>

<script>
import * as echarts from "echarts";
import sta from "@/api/sta";
export default {
  data() {
    return {
      searchObj: {
        type: "",
        begin: "",
        end: "",
      },

      btnDisabled: false,
      chart: null,
      title: "",
      xData: [],
      yData: [],
    };
  },
  methods: {
    showChart() {
      this.initChartData();
    },

    // 准备图表数据
    initChartData() {
      sta.showSta(this.searchObj).then((response) => {


        this.xData = response.data.dateList;
        this.yData = response.data.numList;
        // 当前统计类别
        switch (this.searchObj.type) {
          case "register_num":
            this.title = "学员注册数统计";
            break;
          case "login_num":
            this.title = "学员登录数统计";
            break;
          case "video_view_num":
            this.title = "课程播放数统计";
            break;
          case "course_num":
            this.title = "每日课程数统计";
            break;
        }
             this.setChart();
      });
    },

    // 设置图标参数
    setChart() {
      this.chart = echarts.init(document.getElementById("chart"));

      // 指定图表的配置项和数据
      var option = {
          title: {
                text: this.title
            },
            tooltip: {
                trigger: 'axis'
            },
            dataZoom: [{
            show: true,
            height: 30,
            xAxisIndex: [
                0
            ],
            bottom: 30,
            start: 10,
            end: 80,
            handleIcon: 'path://M306.1,413c0,2.2-1.8,4-4,4h-59.8c-2.2,0-4-1.8-4-4V200.8c0-2.2,1.8-4,4-4h59.8c2.2,0,4,1.8,4,4V413z',
            handleSize: '110%',
            handleStyle: {
                color: '#d3dee5'

            },
            textStyle: {
                color: '#fff'
            },
            borderColor: '#90979c'
            },
            {
            type: 'inside',
            show: true,
            height: 15,
            start: 1,
            end: 35
            }],
            xAxis: {
            type: "category",
            data: this.xData,
            },
            yAxis: {
            type: "value",
            },
            series: [
            {
                data: this.yData,
                type: "line",
            },
            ],
        };
      // 使用刚指定的配置项和数据显示图表。
      option && this.chart.setOption(option);
    },
  },
};
</script>
